Airship



l. ANDERSSGN.

AIRSHIP.

APPLICATION FILED MAR. 1', 1919- RENEWED AUG. 18, 1920.

1 g' g ggg Patented M31229, 119m 2 SHEETS SHEET I.

1. ANDERSSON.

AIRSHIP. v APPLICATION FILED MAR. I, 19i9 RENEWEIS AUQ. H3. 1920. 1 3?Q,9%% Patented. Man 29, 1921;

2 SHEETS-SHEET z.

Mar/M5855 UNETED IVAN ANDERSSON, OF EAST ELMHURST, NEW YORK.

AIBSHIP.

ntense.

Specification of Letters Patent.

iatcnted Mar. 259, 1921.

Application filed March 1, 1919. Serial No. 280,100. Renewed August 18, 1920. Serial No. 404,477.

To all whom it may concern:

Be it known that I, EVAN ANnnnssoN, a subject of the King of Sweden, residing at East Elmhurst, in the county of Queens and State of New York, have invented new and useful 1m aroveinents in Airships, of which the following is a specification.

This invention relates to airships of the nonrigid or semi-rigid type and has for its object a better distribution of load and a reduction of the air resistance. Internal suspensions asheretofore used have the disadvantage of more or less obstructing the interior of the balloon, and also of increasing the envelop surface, as for instance in the lobed shaped balloons, thereby increasing the skin friction of the envelop and reducing the speed of the air ship. The present invention obviates these disadvantages. It consists of a number of internal webs, cords, or other suitable tension members attached to the circumferential surface of the aerostat, and a number of cords, or wires, or other suitable tension members forsupport ing the load and the thrust, suspended from and between the said webs, cords. or tension members in the interior and alongside of the circumferential surface of the aerostat.

This invention will be more fully explained hereinafter with reference to the ac coinpanying drawings, in which Figure 1 shows a cross-section of an airship illustrating the principle of the invention. Fig. 2 is a longitudinal section and Fig. 3 a crosssection of an airship showing the practical application of the invention. Figs. & and 5 show longitudinal section and cross-section respectively of an airship with the invention applied in a modified way. Figs. 6 and 7 are longitudinal section and cross-section respectively of an airship further modified. and Figs. 8. 9, 10, and 11 show details of construction.

In Fig. 1, the tension members A, hereafter called webs, are attached to the envelop B and suitably spaced around the inside of the envelop. C are tension members, hereafter called suspension cords. attached to, and stretched between the webs A alongside of the envelop B. The suspen sion cords C are connected with the car D through cables or other suitable tension members E, and transmit the pull of the load and thrust to the envelop by way of the webs A.

In Figs. 2 and 3 the suspension cords C are stretched between the internal webs A and attached at F to the upper part of the envelop B. In the lower part of the envelop the suspension cords C are connected by cables F to the load which is represented as a car D; The suspension cords are split up into two or more branches as they ap proach the upper part of the envelop, for the purpose of distributing the load more uniformly. r he webs A. may be made in various ways as for example shown in Figs. 8, 9, and 10. They may consist of cords drawn straight. Fig. 8, or in crow feet styl Fig. 9,01 they may consist of fabric. in which case cord is preferably sewn to the fabric in catenary curves stretching between the joints of the webs and suspension cords, Fig. 10.

The webs may be disposed along longitudinal lines on the envelop as shown in Figs. 2 and 3, or they may be attached along transverse lines circumscribing the interior of the envelop illustrated in Figs. and 5. In this case the webs may be inace'as described before and shown in Figs. 8, 9, and 10, or they may constitute a continuous surface all around the interior of the envelop as shown in Fig. 11.

W' hen the individual suspension cords C are drawn in straight planes there is no longitudinal force acting on the webs A and therefore any longitudinal tension members are unnecessary. Only where the suspension cords join or approach the upper part of the envelop is there a longitudinal force present which is here taken up by the envelop itself.

However in some cases, and particularly in larger airships it is desirable to have the horizontal components of the load and thrust spread over a large area of the envelop. For this purpose longitudinal tension members G are stretched between the joints of the webs A and the suspension cords C, their ends being attached to the envelop fore and aft at H and J, Fig. 6. The suspension cords are here drawn in curved planes. Starting first in a straight plane in the lower part of the envelop, they gradually deviate more and more from the straight plane and curve upward until they become perpendicular to the upper part of the envelop so as to split up the longitudinal pull in as many longitudinal components as dearound following the curvature of the en-' velop as shown in Fig. 7.

The connection between the webs A and the suspension cords C may be a fixed one or it may be loose to allow an independent adjustment of the suspension cords.

I claim as my invention:

1. In an aerostat, acircumferential surface, internal tension members attached to the circumferential surface, and tension members attached to the first said tension members and suspended in the interior of, and alongside the circumferential surface, more or less following its curvature.

2. In an aerostat, a circumferential surface, internal tension members attached to the circumferential surface, and tension members attached to the first said tension members and suspended in theinterior of, and alongside the circumferential surface, more or less following its curvature, and means for connecting said tension members with the load.

3. In an aerostat, a circumferential surface, internal tension members attached to the circumferential surface," and tension members attached to the first said tension members and suspended in the interior of, and alongside the circumferential surface, more or less following its curvature, means for connecting said tension members with the load, and tension members suspended between the last said tension 'members,

members attached to the first said tension members and to the circumferential surface and suspended in the interior of, and alongside the circumferential surface, more or less following its curvature.

5. In an aerostat, a circumferential surface, internal tension members attached to the circumferential surface, tension members attached to the first said tension members and to the circumferential surface and suspended in the interior of and alongside the circumferential surface, more or less following its curvature, and means for con necting'said tension members with the load.

6. In an aerostat, a circumferential surface, internal tension members attached to the circumferential surface, tension members attached to the first said tension members and to the circumferential surface and sus-' pended in the interior of, and alongside the circumferential surface, more or less following its curvature, means for connecting said tension members withthe load, and tension members suspended between the last said tension members, alongside meridians of the circumferential surface and connected to the same.

, IVAN ANDERSSON. Witnessed by' r JAMES S. HURWITZ,

JOSEPH H. GOTTLIEB. 

